Strong interactions and disorder in electron systems

电子系统中的强相互作用和无序

• 批准号: RGPIN-2016-06065
• 负责人: Wortis, Rachel
• 金额: $ 1.97万
• 依托单位: Trent University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=633023
• 关键词: Strong; interactions; disorder; electron; systems

Condensed matter physics is the study of the diverse physical properties which arise from the essential ingredients of electrons, nuclei and electromagnetic forces. The materials and patterns which emerge are fascinating in their own right and have often proven to be of immense practical value. This research program aims to build understanding of the properties of systems in which the energy scale associated with the interactions between particles, especially at very short length scales, dominates the kinetic energy. Examples of such systems include transition metal oxides, some organic charge-transfer complexes, and ultracold atomic clouds in magneto-optical traps. Transition metal oxides display a wide range of interesting and potentially useful properties including high-temperature superconductivity, colossal magneto-resistance and multiferroicity. To produce these properties, the materials are often doped by atomic substitution, resulting in variations in parameters at the atomic scale referred to as disorder. The focus of this research is understanding the effect of disorder in strongly interacting systems. In particular I propose to use a careful study of small clusters to enhance understanding of the recently discovered many-body localized phase, use insights from this work to build a new calculation method for studying large systems, and explore ways to observe some of the unique features of strongly correlated systems in the highly controlled environment of quantum dot structures. Understanding and control of exotic materials properties is the driver of fundamentally new technologies.

凝聚态物理学是研究电子、原子核和电磁力的基本成分所产生的各种物理性质的学科。出现的材料和图案本身就很吸引人，而且往往被证明具有巨大的实用价值。该研究计划旨在建立对系统性质的理解，其中与粒子之间相互作用相关的能量尺度，特别是在非常短的长度尺度上，主导动能。这类系统的例子包括过渡金属氧化物、某些有机电荷转移络合物和磁光阱中的超冷原子云。过渡金属氧化物具有高温超导、巨磁电阻和多铁性等一系列重要的物理性质。为了产生这些特性，材料通常通过原子取代进行掺杂，导致原子尺度上的参数变化，称为无序。这项研究的重点是理解强相互作用系统中无序的影响。 特别是，我建议使用小集群的仔细研究，以加强对最近发现的多体定域相的理解，使用这项工作的见解，建立一个新的计算方法来研究大系统，并探索如何观察在量子点结构的高度控制的环境中的一些强关联系统的独特功能。了解和控制奇异材料的特性是新技术的驱动力。